Valve-gear for steam-hammers



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VALVE GEAR FOR STEAM HAMMERS, 7 No. 380,155. Patented Mar. 27,

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; VALVE GEAR FOR STEAM HAMMERS.

No. 380,155. Patented Mar. 27, 1888.

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UNITED STATES CHARLES W. WILLARD,

PATENT OFFICE,

or CHICAGO, ILLINOIS.

VALVE-G EAR FOR STEAM-HAMMERS.

SPECIFICATION forming part of Letters Patent No. 380,155, dated March27, 1888. Application filed May 10, 1887. Serial No. 237,767. (Nomodel.)

To all whom it may concern:

Be it known that I, CHARLES W. WILLARD, residing at Chicago, in thecounty of Cook and State of Illinois, and a citizen of the United 5States, have invented a new and useful -Improvement in Valve -Gears forOperating Steam-Hammers, of which the following is a specification,reference being had to the accompanying drawings, in which Figure 1 is aside elevation with the hammer-helve broken out to foreshorten thedrawings; Fig. 2, a side elevation of the shifting devices; Fig. 3, adetail in perspective of the shifting devices; Fig. 4, a detail showingthe I 5 bar which supports. the vibrating or oscillating lever; Fig. 5,a detail in section of the act'- ing end of the oscillating lever.

This invention relates to means to be used in connection with asteam-hammer for the purpose of controlling the stroke by shifting thevalve through which steam is admitted for the power, and has for itsobjects to improve the construction and operation of the valveshiftingdevices; to improve the location and arrangement of the valve-shiftingdevices in relation to the movement of the hammer and its helve; toimprovethe means for adjusting the shifting devices to produce therequired blow and give either along or short stroke, as may be required,without any lost motion and without any injurious results from theconcussiomand have the arrangement one that cannot be brought into aposition to produce breakage of the devices and cause any damage in casethe hammer is left without an attendant, or in case the attendant shouldneglect his duty, the

\ result being that, so far as shifting the valve is concerned, afterthe devices are once set the operation will be entirely automatic; andits natureco'nsists in the several parts and combination of partshereinafter described, and pointed out in the claims as new.

In the drawings, A represents a tappet having two arms, a, each of whichhas a side extension, a, at the end.

B is the stem of a rotary valve or other form of balance-valve locatedin the steam-chest which supplies steam to the cylinder to actuate thepiston by which the hammer is operated. The tappet A is firmly securedto the the end of the socket d and the face of the leprojecting end ofthe valve-stem B by means of aset-screw, b, or in any other suitablemanner thatwill allow the tappet to be shifted in its relation to itsactuating-lever and-when adjusted be locked firmly in position.

0 is the actuating-lever, having its acting end provided with a contactfor the arms of the tappet, formed by turning the end 0 of the lever atright angles to the body of the lever and securing thereto, by a rivet,c, or otherwise, a piece of hardened steel, 0, to form a face thatwillnot wear out quickly; but this contact for the tappet can be formed insome othjer suitable manner.

D isia .bar having at its outer end a socket, d, through'whioh and thebody of the lever a pivot orbolt, d, is passed forhanging or suspendingthe lever so that it is free to be vibrated or oscillated, and, asshown, between 7o ver 0 is located an anti-friction Washer, 01. E E E"are standards and a base-plate,forming a frame or support for the bar D,and, as shown, the inner end of the bar D has a slotthrough which andthe turned end of 1 the standard E a bolt, 6, is passed. The slot in theend of the support D is for the purpose of enabling the forward end ofthe standard to be adj ustedto bring the lever in proper alignment withthe tappet for the contact end of the lever to enter between the arms ofthe tappet, and, as shown, the upper end of the standard D is screwthreaded, and on this screw-threaded end, on each side of the bar orsupport D, is located a nut, e, by means of which the forward end of thesupport can be adjusted vertically for the acting end of the lever O toco-operate properly with the tappet.

'F' is a sleeve to which the upper end of the lever Gispi'voted, theconnection, as shown, being made by entering the sleeve between the armsf of the forked upper end of the lever and passing a pivot, f, throughthe ends of the arms and through a socket or bearing, f, on the sleeveF.

G G- are set-screws for adjusting the sleeve F and limiting its movementin either direction, as required, to produce a proper throw for thelever G to actuate the tappet.

, H is arod the outer end of which receives I00 the sleeve F and the adjusting-nuts G G, the end of the rod having a screw-thread, g, 'for thenuts. The inner end of the rod H is mounted on a pivot, k, projectingout from a plate, H, which plate is attached by bolts h to the side faceof the pivot-support which carries the hammer-helve.

I is a support for the hammer-helve,between the side walls of which thehelve is placed, and is held in position by means of a capplate, I, andsuitable bolts, i, as usual.

J are journals for the support I, a journal being provided for each sideof the support, and each journal is mounted in a suitable box or bearingon the end of the uprights or standards J.

K is the hammer-he] ve,which may be formed of two parts, as shown, andsecured together by suitable straps or in any other suitable manner.This helve at its acting end has a hammer, K, adapted to receive the dieor dies K to be used therewith.

L is the anvil, adapted to receive a die or dies, L, to correspond withthe dies K.

M is a pitman connected at one end with the hammersupport I, as usual,and at the other end with the piston-head in the steamcylinder.

N is the steam-cylinder, on one side of which is a steam-chest, N,having therein a balancevalve actuated from the stem B, and having alsothe usual ports for the passage of the steam to operate the piston-headto work the hammer through the pitman M and support I.

O is the supply-pipe for the steam entering the steam-chest N.

P is the exhaust-pipe.

The pivot 71. for the rod H is located above and at one side of thecenter of motion of the support I, as will be seen from Figs. 1 and 2,and this location of the pivot h gives to the rod H an easy motion, andone which is parallel, or approximately so, with the motion of thehammer-helve, and this manner of locating the pivot of the rod H inproximity to the center of motion of the hammer brings the support ofthe rod in such relation to the move ment of the hammer that but little,if any, effect of the concussion of the blow will be transmitted to therod, thus leaving the rod, in effect, non-susceptible to the jar of theconcussion of the hammer-blow, and as this rod operates by itsreciprocation thelever C it will be seen that the concussion from thehammer cannot be transmitted to the lever to produce ill effects or toshift the valve before the required time. Thereciprocating rod,threadedat the end, in connection with the adjustable nuts, one on each side ofthe sleeve F, enables an easy and quick adjustment to be had for anylength of stroke and weight of blow de sired. The oscillating orvibrating lever C, suspended from the adjustable bar D, enables theacting end of the lever to be adjusted in position to enter the openingbetween the arms a as required for the end of the lever to pass a. Thisconstruction furnishes a support for the tappet A, by which it cannotdrop back and shift the valve until the lever has completed its movementand returned to strike the other arm a, the result being that the leverO and tappet A not only furnish the means of shifting the valve, butalso the means for holding the valve after being shifted. The nuts G Gare set down for a short stroke, and for a long stroke the nuts are runout correspondingly, and when the nuts are ad usted for a long stroke,and it is desired to shift the valve and operate the hammer before thefull stroke has been made, the operator can do so by taking hold of thehandle f on one of the arms f of the fork at the end of the lever, andthereby swing the lever and cause its acting end to operate the tappetA.

The operation is as follows: The steam passes through the pipe 0 fromthe source of supply, enters the steam-chest N, and passes to'thecylinder N, above or below the piston, to operate the pitmau M and workthe hammer. As shown in Fig. 1, the hammer has made its downward strokeand the parts are in the position to raise the helve, and as the steamacts and raises the support I the plate H is carried around on a circlethe center of which is the center of motion of the journals J, and thiscircular motion of the plate I draws the rod H back, such movement beingpermitted by the pivotal connection of the rod H to the pin or pivot h,and this backward movement of the rod H carries with it the upper end ofthe lever 0 through its connection with the sleeve F, moving the lowerend of the lever in the opposite direction to engage with the arma onthe opposite side and move the tappet A in the opposite direction, asshown in Fig. 2, to shift the valve, and on the descent of the hammerthe rod H is advanced by the movement of the plate H to bring the lowerend of the lever into the position shown in Fig. 1, and these theposition of the tappet A and shift the valve will occur with each riseand fall of the hammer, and when the blow is to be increased themovements of the rod H and lever G to change nuts G G are changedaccordingly to allow of 5 the proper movement of the lever O to shiftthe valve, and this adjustment of blow and 7 the hammer-helve K andconnected at one end with the frame or support of the hammer-helve at apoint within a vertical linepassing through the journal of thehammer-helve and at the other end with a valve-shifting lever,substantially as shown and described.

2. The rod H, approximately parallel with the hammer-helve K andconnected at one end with the frame or support of the hammer-helve at apoint within avertical line passing through the journal of thehammer-helve and at the other end with a lever, O, in combination with atappet, A, connected with a balanced valve for shifting thevalve,substantially as specified.

3. The rod H, approximately parallel with the hammer-helve K andconnected at one end with the frame or support of the hammer-helve' at apoint within a vertical line passing through the journal of thehammer-'helve, and the nuts G G, in combination with the lever G andsleeve F, for actuating the shifting devices of a balance-valve of apower-hammer, substantially as shown and described.

4. The tappet A, having the arms a, in combination with the lever G andoperating-rod H, connected with the frame or support of a hammer-helvefor shifting the valve in a steampower hammer, substantially asdescribed.

5. The lever 0, adjustable rod D, and a supjusting-nuts G G, rod H,pivot h, and support I, having the journals J, for operating the 'valvein asteam-power hammer, substantially as described.

CHARLES W. WILLARD.

Witnesses:

HARRY T. J onus,

ALBERT H. ADAMS.

